what did you use for a drift? You tend to use a drift of softer material than what you are trying to knock home and seated
Thought I was being clever.. braised old valve guides, for sortness, onto old valve stem, for good fit and stop any squashing ..ah well nothing ventured only cash lost!
Just turn a stepped shaft in mild steel and make sure they go in square .you will need to recut the seats after . Not just lap .. I have the shafts and recutting tools if you wish to borrow
Kind offer.. I'll have a think when I've finished sulking whether I should admit defeat and pay someone or re-group and go again.....
I missed the post ref valve seat ...... Mine went in nice ...used a copper mallet and stainless stepped shaft ...you have to be quick before the heat expands the guide .... Think you may have had a loose seat as it shouldn't have fallen out
that may and its a very big may be recoverable. you need to genly polish it with emery paper, rough grade to start with, flat on top, following the contours. go again with finer grade. it may work, may not!
I was trying to rattle the valves in quickly with an air hammer... and they must shrink faster than the rest of the head Tried popping em back in ...now they're stuck half in half out... Not a good day...
Bad days happen! I was involved in an air crash investigation a few years back, an Airbus crashed coming in to Heathrow & part of the landing gear broke on impact. We had samples of landing gear to test, I had to load a sample to fracture in nine hours..it took nine minutes. Ooops. Called the company we was working for, explained to the guy we was dealing with, he was far from a happy bunny. Partly because I f****d up and wasted limited samples but more because he got his sums wrong too and broke his samples in seconds!
Hi IHU.. Insomnia set in now..! Can I take you up on your offer please? We go again.... at least on one head while i see about getting that dent machined out of the one I dropped!!!!...
Any seats that fall out at this stage need to be replaced with over-size seats... As for the guide, you'll have to drill it out now, as trying to drive it back out will result in the boss breaking in the head... Give me a call if you want me to do it for you... very few places touch aircooled heads these days for this very reason
Cheers.. You're up in the North East aren't you? How close to Teeside? Guessing the oversize seats means machining the head first!.. Might call you later while I think about writing this one off with it needing re-facing too ...don't know if all this work is worth it for a bog standard runabout.
I'm a little ways from Teeside, I'm about 10 minutes down the A69 off the A1. The head and/or the new seat would require machining... You're usually looking at around £25 per seat, plus the cost of the seat, so you're close to the cost of a new head by time you're all said and done really.. Bear in mind though, that CJ engines run smaller valves that what the new heads are supplied with, so double check what you have got, as you could end up wanting a pair of new heads to keep the valve sizes matched!!
Cheers Paul.. I'll have to have a think about where best to spend me money!.. Chambers need refacing to remove the dents from dropping it like it's hot.. it was actually hot..... Yet another school day in engine rebuilding. ..
Took a punt on a type 4 2.0 head that was up on ebay finishing local to where I was ...looked in good nick....square port..what could go wrong.. ^^whs^^ ...Not all 2.0ltr square port heads are the same.. Turns out the first three smudgy numbers were not 029.101.371 but 071.101.371... bigger intake valve!.. hopefully one of the other two dirty heads he threw in both 029's are ok on cleaning up!
